I don't intend to claim that that one issue delivered the vote. On the contrary, I would argue that most Black voters (the same as most white voters) are multi-issue voters. No single issue will make a Democrat feel comfortable with the Republican party.
And most important of all, Republicans need to avoid stereotyping Blacks (and labor union members and rednecks) as reachable and welcome just on a single issue.
Wow. Now that you mention it, that could very well be true. That issue had slipped by me.